did API change?

[acomito]

I was getting errors at first ("must pass in a port or server"), SubscriptionServer needs an object as the second arg:

const createApolloSubscriptionServer = ({ subscriptionManager }) => {
    const httpServer = createServer((request, response) => {
        response.writeHead(404);
        response.end();
    });
    console.log(WS_PORT)
    httpServer.listen(WS_PORT, () => console.log(
        `Websocket Server is now running on port ${WS_PORT}`
    ));

    return new SubscriptionServer({ subscriptionManager }, { server: httpServer }); // change here
}

found it by comparing your repo to this tutorial:

https://medium.com/@simontucker/building-chatty-part-6-graphql-subscriptions-b54df7d63e27